/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.engine.impl.persistence.entity;

import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.activiti.engine.impl.persistence.AbstractManager;

/**
 * @author Tom Baeyens
 * @author Joram Barrez
 * @author Saeid Mirzaei
 */
public class VariableInstanceEntityManager extends AbstractManager {

    @SuppressWarnings("unchecked")
    public List<VariableInstanceEntity> findVariableInstancesByTaskId(String taskId) {
        return getDbSqlSession().selectList("selectVariablesByTaskId", taskId);
    }

    @SuppressWarnings("unchecked")
    public List<VariableInstanceEntity> findVariableInstancesByTaskIds(Set<String> taskIds) {
        return getDbSqlSession().selectList("selectVariablesByTaskIds", taskIds);
    }

    @SuppressWarnings("unchecked")
    public List<VariableInstanceEntity> findVariableInstancesByExecutionId(String executionId) {
        return getDbSqlSession().selectList("selectVariablesByExecutionId", executionId);
    }

    @SuppressWarnings("unchecked")
    public List<VariableInstanceEntity> findVariableInstancesByExecutionIds(Set<String> executionIds) {
        return getDbSqlSession().selectList("selectVariablesByExecutionIds", executionIds);
    }

    public VariableInstanceEntity findVariableInstanceByExecutionAndName(String executionId, String variableName) {
        Map<String, String> params = new HashMap<>(2);
        params.put("executionId", executionId);
        params.put("name", variableName);
        return (VariableInstanceEntity) getDbSqlSession().selectOne("selectVariableInstanceByExecutionAndName", params);
    }

    @SuppressWarnings("unchecked")
    public List<VariableInstanceEntity> findVariableInstancesByExecutionAndNames(String executionId, Collection<String> names) {
        Map<String, Object> params = new HashMap<>(2);
        params.put("executionId", executionId);
        params.put("names", names);
        return getDbSqlSession().selectList("selectVariableInstancesByExecutionAndNames", params);
    }

    public VariableInstanceEntity findVariableInstanceByTaskAndName(String taskId, String variableName) {
        Map<String, String> params = new HashMap<>(2);
        params.put("taskId", taskId);
        params.put("name", variableName);
        return (VariableInstanceEntity) getDbSqlSession().selectOne("selectVariableInstanceByTaskAndName", params);
    }

    @SuppressWarnings("unchecked")
    public List<VariableInstanceEntity> findVariableInstancesByTaskAndNames(String taskId, Collection<String> names) {
        Map<String, Object> params = new HashMap<>(2);
        params.put("taskId", taskId);
        params.put("names", names);
        return getDbSqlSession().selectList("selectVariableInstancesByTaskAndNames", params);
    }
    
    @SuppressWarnings("unchecked")
    public List<VariableInstanceEntity> findVariableInstancesBySubScopeIdAndScopeType(String subScopeId, String scopeType) {
        Map<String, Object> params = new HashMap<>(2);
        params.put("subScopeId", subScopeId);
        params.put("scopeType", scopeType);
        return getDbSqlSession().selectList("selectVariableInstancesBySubScopeIdAndScopeType", params);
    }

    public void deleteVariableInstanceByTask(TaskEntity task) {
        Map<String, VariableInstanceEntity> variableInstances = task.getVariableInstanceEntities();
        if (variableInstances != null) {
            for (VariableInstanceEntity variableInstance : variableInstances.values()) {
                variableInstance.delete();
            }
        }
    }
}
